
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:25 AM
micromass

1 
31,967 
The opposite of a great truth is also a great truth  T. Mann
For example, the opposite of empty set {} is a...

Jul1711 01:23 AM
chiro

2 
1,909 
Hey,
I am trying to find the probability that exactly two people out of m have the same birthday. I know that the...

Jul1511 02:12 AM
ndrue

15 
15,283 
Hi everyone,
My data consists of road accidents and spatial covariates. Originally i wanted to apply an...

Jul1311 02:53 AM
adayao

7 
2,162 
I've been trying to figure out how to do a linear regression on data with asymmetric x and y error bars (different for...

Jul1311 06:53 AM
pmsrw3

11 
5,487 
I don't even know how to start this question:
I have 6 pairs of socks (12 socks) of different colors.
If I...

Jul1411 07:56 PM
julie9612

4 
2,990 
If all the exams have normal distribution will the average grades to student also be normal distributed?
I have...

Jul1111 08:45 AM
MaxManus

4 
1,582 
Let X be a nonempty set, and let S contain all countable subsets of X. Partially order S by inclusion. Let C be a...

Jul1111 09:19 AM
Josh Swanson

11 
4,103 
Hi, it will be a very silly question, excuse me plz.
I am wondering whether
3/(sqrt(2pi delta^2))...

Jul1111 08:07 AM
wall_e

4 
2,442 
suppose i have 2 bayesian networks....
a>b and c>d ie b depends on a and d depends on b
now...

Jul1011 05:41 PM
SW VandeCarr

3 
1,170 
Olbers' paradox states that if the universe is infinite, static and homogeneous then why is the night sky dark. Of...

Jul911 08:35 PM
pmsrw3

3 
1,798 
I believe that it is correct, and it concisely represents a concept I have never understood. It seems obvious to me...

Jul911 07:40 PM
pmsrw3

3 
1,176 
In a box with 80 tickets, 10 people buy 10 tickets each. If there are 4 winning tickets drawn at random find the...

Jul1011 05:40 AM
tinytim

1 
1,053 
Hi there,
I am thinking a question of finding the expectation of duplicate numbers (how many time any pair could be...

Jul1011 07:35 PM
bpet

1 
784 
Guys,
I'm taking real analysis starting with open, close, compact sets, and neighborhoods. Now I'm addict to rely...

Jul1111 10:58 AM
micromass

2 
1,364 
Is there a way to calculate/estimate how big a sample from a parent distribution would need to be for the distribution...

Jul1111 08:33 PM
bpet

2 
1,485 
Could someone please advise me how to put the integral from + to  infinity notation used $ exp{1/2(yx)^2(A^1) +...

Jul1311 01:54 PM
EmmaSaunders1

34 
3,020 
I'm wondering how conditional probability relates to concepts of sample space, observation space, random variable,...

Jul1511 08:18 AM
Rasalhague

6 
1,666 
Hey all.
I have some data, approximately 6 months worth. It is values that do not depend on time but are...

Jul1811 10:48 AM
kdbnlin78

13 
1,942 
Hi,
I will thank If somebody help me solving this problem.
Consider a random variable k_1 with the given pmf...

Jul1411 05:01 AM
sabbagh80

2 
1,921 
I have a set of data points {xi,yi} where each yi is a Gamma distributed variable where both the shape k and scale...

Jul1411 11:13 PM
bpet

6 
1,152 
What is the function that I get when I take a large sample from an exponential distribution (many values from the same...

Jul1511 08:22 AM
pmsrw3

7 
1,208 
A random variable is defined as a function from one set, called a sample space, to another, called an observation...

Jul1511 06:19 PM
micromass

9 
1,105 
Here, to further test my understanding, is an attempt to apply the measury theory definitions of a probability space...

Jul1511 07:02 PM
micromass

5 
2,611 
Given 4 axioms in real Nos:
1) 1x = x ,for all x
2) x+0 = x ,for all x
3) (x+y)z = xz+yz ,for all x,y,z
4)...

Jul1611 08:04 PM
evagelos

2 
885 
Does every infinite set contain an infinite, countable subset?
If so, why? (I'm assuming this depends on the Axiom...

Jul2211 03:27 PM
mathman

25 
5,464 
Hello all,
I'm currently working on a problem in which I'm attempting to characterize a centered Gaussian random...

Jul1711 08:32 AM
Aimless

1 
1,838 
These three quotes talk about the use of the Poisson and normal distributions as approximations for the binomial when...

Jul1711 11:01 AM
Rasalhague

3 
2,271 
prove the following equivalences:
1)\neg\forall x\neg Fx\Longleftrightarrow\exists xFx
2)\neg\forall x...

Jul1711 07:58 AM
evagelos

0 
838 
In an ANOVA experiment, you have,
group mean \overline{y}.
overall mean \overline{y}..
Are they independent? ...

Jul1811 04:23 PM
colstat

20 
2,173 
Hello,
Let X be a set of N lognormal prices (in dollars), meaning
\log(X) = Y \sim MN(\mu_Y , \Sigma_Y) ,
i.e....

Jul2011 11:31 AM
mtal

6 
1,486 
Hi,
could someone possible make something clear for me  I have come across this notation for a binomial PMF formed...

Jul2011 07:56 AM
EmmaSaunders1

9 
1,888 
If the set of real numbers is considered as a sample space with the Borel sigma algebra for its events, and also as an...

Jul1911 01:51 PM
disregardthat

7 
1,639 
Here's the issue. I have two curves that are dependent on each other (part of a bigger solution set). The logic of...

Jul1911 05:14 PM
tangodirt

0 
671 
What book or course would you recomend to a beginner in Probability and Statistics?
That is my question. However I...

Jul2111 08:50 PM
chiro

5 
2,012 
Hello,
I am trying to figure out what test to use in order to solve a fairly basic concept. I am not sure if this is...

Jul2111 10:23 AM
Stephen Tashi

5 
1,008 
My course notes and textbook express this differently:
To construct the confidence interval for diff. between...

Jul2211 11:02 AM
pmsrw3

1 
1,320 
I'm reading a stat textbook and it says the following:
Let a discretetime random walk be defined by Xt = Xt1 +...

Jul2111 08:52 PM
chiro

11 
4,928 
Hi, All:
The standard way of approaching the birthday problem, i.e., the problem of
determining the...

Jul2211 07:49 AM
Bacle

2 
1,326 
I have read that the statistic computed for the unpaired two sample ttest is:
t = \frac{\bar{x} ...

Jul2211 02:05 AM
chever

2 
1,766 
I am intrigued by the idea of changing/dynamic transition probability matrix instead of the assumption of constant...

Jul2211 02:18 PM
Stephen Tashi

1 
1,999 